什麼是光閃爍？
我們看得到燈光閃爍嗎？
[Vision] What is resolution
Resolution, also known as resolution, generally refers to the ability of a measurement or display system to resolve details.
Resolution is usually measured in units of (mm/pixel) or (um/pixel).
That is, how much length can be resolved per unit pixel. The smaller the number, the finer the resolution and the higher the resolution capability.
[Lens] The relationship between NA value and F number (F number)
The optical F-number (F-number) refers to the ratio of the aperture diameter to the focal length of the optical system (also called the aperture value). The smaller it is, the greater the amount of light entering and the shallower the depth of field.
Numerical aperture (NA) is a performance indicator of a lens or optical system. The higher it is, the better the resolution (resolution) of the system, and smaller details can be clearly seen.
[Camera] What is the difference between global and rolling shutter types
Global Shutter:
◆Global Shutter obtains an image by simultaneously exposing all pixels on the entire image sensor.
◆ The shutter opens and closes at the same time, and the pixels of the entire frame are captured.
◆This kind of shutter is suitable for shooting fast-moving objects. It can eliminate distortion and deformation caused by movement and provide more accurate time stamps.
◆Usually used for scientific experiments, industrial testing and certain professional photography needs.
Rolling Shutter:
◆ Rolling Shutter reads the pixels on the camera sensor line by line during exposure, reading line by line like “rolling”
◆ The shutter rolls from one side of the sensor to the other, and there will be a time difference in reading each line, which may cause distortion or deformation of moving objects.
→ The choice of shutter type depends on the needs of the application and budget.
小學堂-不可見光影像大解密
[Light source] What causes LED aging?
Long-term continuous use of the LED light source under high temperature conditions will accelerate its aging and continuously reduce the radiation output, even after cooling down, it will not return to the original radiation output.
Methods to prevent LED overheating and aging
※Try to avoid using LED lights at the maximum dimming level.
※Only turn on the light when you want to observe the image
[Vision] What is fluorescence?
Fluorescence is a substance that absorbs light energy and enters an excited state after being irradiated by light of a specific wavelength, and then immediately de-excites, releasing visible light that is longer than the wavelength of the incident light. This phenomenon is called fluorescence. The application is as follows:
1.Material detection: Fluorescent markers can be used to detect and identify a variety of materials, including plastics, glass, metals, and more.
2.Chemical analysis: Fluorescent labels can be used to analyze and detect chemicals, such as in pharmaceutical manufacturing, food safety testing, and environmental monitoring.
3.Biotechnology: In biology and medicine, fluorescent labels are widely used in cell analysis, protein detection, gene expression studies, and the development of diagnostic tools.
4.Lighting: Certain fluorescent materials are used to create high-efficiency lighting devices, such as fluorescent tubes and LEDs.
5.Anti-counterfeiting: Fluorescent materials can be used as security marks and anti-counterfeiting technology to protect products from counterfeiting and theft.